1
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Brzeski J, Wyrzykowski D, Chylewska A, Makowski M, Papini AM, Makowska J. Metal-Ion Interactions with Dodecapeptide Fragments of Human Cationic Antimicrobial Protein LL-37 [hCAP(134-170)]. J Phys Chem B 2022; 126:6911-6921. [PMID: 36047059 PMCID: PMC9483913 DOI: 10.1021/acs.jpcb.2c05200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/24/2022] [Indexed: 12/31/2022]
Abstract
Isothermal titration calorimetry, circular dichroism (CD) techniques, and in silico analysis were used to determine potential metal binding sites in human cationic antimicrobial protein (hCAP) corresponding to overlapping the dodecapeptide sequences of hCAP(134-170) referred to as LL-37. The correct antibacterial action of LL-37 is closely related to its established unique structure. Disturbances in the LL-37 structure (e.g., unwanted presence of metal ions) lead to a radical change in its biological functions. Five fragments of the LL-37 [hCAP(134-170)], namely, hCAP(134-145) (A1), hCAP(140-151) (A2), hCAP(146-157) (A3), hCAP(152-163) (A4), and hCAP(159-170) (A5), were taken into account and their affinity to Mn(II) and Zn(II) ions was rigorously assessed. We prove that only three of the investigated peptides (A1, A2, and A5) are capable of forming thermodynamically stable complexes with metal ions. Additionally, based on density functional theory (DFT) calculations, we propose the most likely coordination modes of metal(II) to peptides as well as discuss the chemical nature of the interactions. Finally, we present the structural features of the strongest binding peptide, hCAP(159-170), responsible for the metal binding. The presented results provide important structural and thermodynamic information to understand the influence of some metal ions on the activity of hCAP(134-170).
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Affiliation(s)
- Jakub Brzeski
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15218, United States
| | - Dariusz Wyrzykowski
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Agnieszka Chylewska
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Mariusz Makowski
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Anna Maria Papini
- Interdepartmental
Research Unit of Peptide and Protein Chemistry and Biology, Department
of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Joanna Makowska
- Faculty
of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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2
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Li XY, Zhang MM, Zhou XD, Hu JM. A functional peptide-mediated colorimetric assay for mercury ion based on dual-modified gold nanoparticles. Anal Biochem 2021; 631:114369. [PMID: 34516968 DOI: 10.1016/j.ab.2021.114369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/09/2021] [Accepted: 09/06/2021] [Indexed: 11/29/2022]
Abstract
In the work, a rapid and accurate biosensor for mercury ions (Hg2+) was constructed, with which aggregation of dual-modified (DGPFHR- and CALNN-) gold nanoparticles (D/C-AuNPs) could be triggered by the high specificity of peptides to Hg2+. The given peptide DGPFHR possesses great capability of capturing Hg2+, accompanied by the conformational folding. Under the circumstances, D/C-AuNPs were employed as the detection probes to accomplish the quantitative analysis of Hg2+. This is primarily because the specific Hg2+-induced folding of peptides reduces the electrostatic repulsion and steric hindrance, thus accelerating the AuNPs aggregation. The principle and application potential of this proposal was proved by evidence. And the results demonstrated that Hg2+ ions could be selectively detected as low as 28 nM with a linear range of 100-800 nM. In consideration of superior simplicity, selectivity, accuracy and stability, the protocol was advantageous over other projects in practical measurement of various water samples.
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Affiliation(s)
- Xin-Yi Li
- The Centre of Analysis and Measurement of Wuhan University, Wuhan University, Wuhan, 430072, PR China
| | - Miao-Miao Zhang
- The Centre of Analysis and Measurement of Wuhan University, Wuhan University, Wuhan, 430072, PR China
| | - Xiao-Dong Zhou
- The Centre of Analysis and Measurement of Wuhan University, Wuhan University, Wuhan, 430072, PR China.
| | - Ji-Ming Hu
- The Centre of Analysis and Measurement of Wuhan University, Wuhan University, Wuhan, 430072, PR China.
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3
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Hernandez ET, Rogelio Escamilla P, Kwon SY, Partridge J, McVeigh M, Rivera S, Reuther JF, Anslyn EV. 2,2'-Bipyridine and hydrazide containing peptides for cyclization and complex quaternary structural control. NEW J CHEM 2018; 42:8577-8582. [PMID: 30386131 DOI: 10.1039/c8nj00184g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synthetic peptide containing two Nε-methyl lysines (Ac-K(Nε-Me)GYTGYTGK(Nε-Me)D-OH) was alkylated with bipyridine (bipy) ligands substituted at the fifth (MP-5) and sixth (MP-6) positions, thereby creating Ac-K(Nε-Me, Nε-Bipy)GYTGYTGK(Nε-Me, Nε-Bipy)D-OH. Peptides with 6-position bipyridine did not bind to Fe2+ and Zn2+. Peptides with 5-position bipyridine bound these metals, and in the presence of one equivalent of a free bipy derivative folded into a macrocycle. Further, the free bipy derivative could also contain a cyclized peptide derived from hydrazone formation, resulting in complex but controlled quaternary peptide structure.
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Affiliation(s)
- Erik T Hernandez
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - P Rogelio Escamilla
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - Sang-Yop Kwon
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - Jonathan Partridge
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - Matthew McVeigh
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - Sebastian Rivera
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - James F Reuther
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
| | - Eric V Anslyn
- Department of Chemistry, University of Texas at Austin, Austin, TX, 78712-1224, USA
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4
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Mesterházy E, Lebrun C, Jancsó A, Delangle P. A Constrained Tetrapeptide as a Model of Cu(I) Binding Sites Involving Cu4S6 Clusters in Proteins. Inorg Chem 2018; 57:5723-5731. [DOI: 10.1021/acs.inorgchem.7b02735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Edit Mesterházy
- INAC, SYMMES, Université Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged H-6720, Hungary
| | - Colette Lebrun
- INAC, SYMMES, Université Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - Attila Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged H-6720, Hungary
| | - Pascale Delangle
- INAC, SYMMES, Université Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
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5
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Affiliation(s)
- Wenhu Zhou
- Xiangya
School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Runjhun Saran
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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6
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Sharma S, Chauhan M, Jamsheera A, Tabassum S, Arjmand F. Chiral transition metal complexes: Synthetic approach and biological applications. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Baskin M, Panz L, Maayan G. Versatile ruthenium complexes based on 2,2′-bipyridine modified peptoids. Chem Commun (Camb) 2016; 52:10350-3. [DOI: 10.1039/c6cc04346a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Helical peptoids bearing 2,2′-bipyridine form ruthenium complexes via intermolecular binding to linear peptoid strands or intramolecular binding to a cyclic scaffold.
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Affiliation(s)
- Maria Baskin
- Schulich Faculty of Chemistry
- Technion-Israel Institute of Technology
- Haifa
- Israel
| | - Larisa Panz
- Organic Mass Spectrometry Laboratory
- Technion-Israel institute of technology
- Haifa 32000
- Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry
- Technion-Israel Institute of Technology
- Haifa
- Israel
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8
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Formation of anti- versus syn-dinuclear CuII complexes from bis-glycinamide ligands. Synergistic roles of a His/His dyad and supporting-ligand backbones in CuII binding. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.11.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Slope LN, Peacock AFA. De Novo Design of Xeno-Metallo Coiled Coils. Chem Asian J 2015; 11:660-6. [DOI: 10.1002/asia.201501173] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Indexed: 01/08/2023]
Affiliation(s)
- Louise N. Slope
- School of Chemistry; University of Birmingham; Edgbaston B15 2TT UK
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10
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Cal M, Kotynia A, Jaremko Ł, Jaremko M, Lisowski M, Cebo M, Brasuń J, Stefanowicz P. Metallacrowns as products of the aqueous medium self-assembly of histidinehydroxamic acid-containing polypeptides. Dalton Trans 2015; 44:11172-81. [PMID: 26008716 DOI: 10.1039/c5dt01267h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Self-assembly is a widely studied, spontaneous, and reversible phenomenon leading to the formation of the ordered structures by non-covalent specific interactions among starting molecules. In this work, a new template for the self-assembly of polypeptides based on peptides containing the C-terminal histidinehydroxamic acid moiety and Cu(2+) ions is characterized. Two peptide (tripeptide and pentadecapeptide) hydroxamic acid systems were synthesized and their interactions with Cu(2+) ions were investigated, revealing a high stability of the supramolecular assemblies formed. The supramolecular metallacrown-based L4Cu5 complexes exist at physiological pH in the presence of Cu(2+) ions as is evidenced from the spectroscopic methods, ESI mass spectrometry, and physicochemical techniques.
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Affiliation(s)
- Marta Cal
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, 50-383 Wroclaw, Poland.
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11
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Lewis JC. Metallopeptide catalysts and artificial metalloenzymes containing unnatural amino acids. Curr Opin Chem Biol 2015; 25:27-35. [PMID: 25545848 PMCID: PMC4380757 DOI: 10.1016/j.cbpa.2014.12.016] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/03/2014] [Accepted: 12/11/2014] [Indexed: 01/24/2023]
Abstract
Metallopeptide catalysts and artificial metalloenzymes built from peptide scaffolds and catalytically active metal centers possess a number of exciting properties that could be exploited for selective catalysis. Control over metal catalyst secondary coordination spheres, compatibility with library based methods for optimization and evolution, and biocompatibility stand out in this regard. A wide range of unnatural amino acids (UAAs) have been incorporated into peptide and protein scaffolds using several distinct methods, and the resulting UAAs containing scaffolds can be used to create novel hybrid metal-peptide catalysts. Promising levels of selectivity have been demonstrated for several hybrid catalysts, and these provide a strong impetus and important lessons for the design of and optimization of hybrid catalysts.
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Affiliation(s)
- Jared C Lewis
- University of Chicago, Department of Chemistry, 5735 South Ellis Avenue, Chicago, IL 60637, United States.
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12
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Zou R, Wang Q, Wu J, Wu J, Schmuck C, Tian H. Peptide self-assembly triggered by metal ions. Chem Soc Rev 2015; 44:5200-19. [DOI: 10.1039/c5cs00234f] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review summarizes the recent development of structures, functions, as well as strategies of a peptide self-assembly induced by metal ions.
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Affiliation(s)
- Rongfeng Zou
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Qi Wang
- College of Public Health
- Nantong University
- Nantong 226019
- China
| | - Junchen Wu
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jingxian Wu
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Carsten Schmuck
- Institute for Organic Chemistry
- University of Duisburg-Essen
- Essen 45117
- Germany
| | - He Tian
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
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13
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Yu F, Cangelosi VM, Zastrow ML, Tegoni M, Plegaria JS, Tebo AG, Mocny CS, Ruckthong L, Qayyum H, Pecoraro VL. Protein design: toward functional metalloenzymes. Chem Rev 2014; 114:3495-578. [PMID: 24661096 PMCID: PMC4300145 DOI: 10.1021/cr400458x] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fangting Yu
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | | | | | | | - Alison G. Tebo
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | - Leela Ruckthong
- University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Hira Qayyum
- University of Michigan, Ann Arbor, Michigan 48109, United States
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14
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Oheix E, Peacock AFA. Metal-ion-regulated miniature DNA-binding proteins based on GCN4 and non-native regulation sites. Chemistry 2014; 20:2829-39. [PMID: 24478111 DOI: 10.1002/chem.201303747] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Indexed: 02/06/2023]
Abstract
The design of artificial peptide dimers containing polypyridine switching domains, for which metal-ion coordination is shown to regulate DNA binding, is reported. Short peptides, based on the basic domain of the GCN4 transcription factor (GCN4bd), dimerised with either 2,2'-bipyridine (bipy(GCN4bd)2 ) or 2,2':6',2''-terpyridine (terpy(GCN4bd)2 ) linker units, undergo a conformational rearrangement on Cu(II) and Zn(II) coordination. Depending on the linker substitution pattern, this is proposed to alter the relative alignment of the two peptide moieties, and in turn regulate DNA binding. Circular dichroism and UV-visible spectroscopy reveal that Cu(II) and Zn(II) coordination promotes binding to DNA containing the CRE target site, but to a differing and opposite degree for the two linkers, and that the metal-ion affinity for terpy(GCN4bd)2 is enhanced in the presence of CRE DNA. Binding to DNA containing the shorter AP1 target site, which lacks a single nucleobase pair compared to CRE, as well as half-CRE, which contains only half of the CRE target site, was also investigated. Cu(II) and Zn(II) coordination to terpy(GCN4bd)2 promotes binding to AP1 DNA, and to a lesser extent half-CRE DNA. Whereas, bipy(GCN4bd)2 , for which interpeptide distances are largely independent of metal-ion coordination and less suitable for binding to these shorter sites, displays allosteric ineffective behaviour in these cases. These findings for the first time demonstrate that biomolecular recognition, and specifically sequence-selective DNA binding, can be controlled by metal-ion coordination to designed switching units, non-native regulation sites, in artificial biomolecules. We believe that in the future these could find a wide range of applications in biotechnology.
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Affiliation(s)
- Emmanuel Oheix
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT (UK)
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15
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Gamble AJ, Peacock AFA. De novo design of peptide scaffolds as novel preorganized ligands for metal-ion coordination. Methods Mol Biol 2014; 1216:211-31. [PMID: 25213418 DOI: 10.1007/978-1-4939-1486-9_11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This chapter describes how de novo designed peptides can be used as novel preorganized ligands for metal ion coordination. The focus is on the design of peptides which are programmed to spontaneously self-assemble into α-helical coiled coils in aqueous solution, and how metal ion binding sites can be engineered onto and into these structures. In addition to describing the various design principles, some key examples are covered illustrating the success of this approach, including a more detailed example in the case study.
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Affiliation(s)
- Aimee J Gamble
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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16
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A dual role of phenylboronic acid as a receptor for carbohydrates as well as a quencher for neighboring pyrene fluorophore. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.11.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Kuo LH, Li JH, Kuo HT, Hung CY, Tsai HY, Chiu WC, Wu CH, Wang WR, Yang PA, Yao YC, Wong TW, Huang SJ, Huang SL, Cheng RP. Effect of charged amino acid side chain length at non-hydrogen bonded strand positions on β-hairpin stability. Biochemistry 2013; 52:7785-97. [PMID: 24156236 DOI: 10.1021/bi400911p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
β-Sheets have been implicated in various neurological disorders, and ∼20% of protein residues adopt a sheet conformation. Therefore, studies on the structural origin of sheet stability can provide fundamental knowledge with potential biomedical applications. Oppositely charged amino acids are frequently observed across one another in antiparallel β-sheets. Interestingly, the side chains of natural charged amino acids Asp, Glu, Arg, Lys have different numbers of hydrophobic methylenes linking the backbone to the hydrophilic charged functionalities. To explore the inherent effect of charged amino acid side chain length on antiparallel sheets, the stability of a designed hairpin motif containing charged amino acids with varying side chain lengths at non-hydrogen bonded positions was studied. Peptides with the guest position on the N-terminal strand and the C-terminal strand were investigated by NMR methods. The charged amino acids (Xaa) included negatively charged residues with a carboxylate group (Asp, Glu, Aad in increasing length), positively charged residues with an ammonium group (Dap, Dab, Orn, Lys in increasing length), and positively charged residues with a guanidinium group (Agp, Agb, Arg, Agh in increasing length). The fraction folded and folding free energy for each peptide were derived from the chemical shift deviation data. The stability of the peptides with the charged residues at the N-terminal guest position followed the trends: Asp > Glu > Aad, Dap < Dab < Orn ∼ Lys, and Agb < Arg < Agh < Agp. The stability of the peptides with the charged residues at the C-terminal guest position followed the trends: Asp < Glu < Aad, Dap ∼ Dab < Orn ∼ Lys, and Agb < Arg ∼ Agp < Agh. These trends were rationalized by thermodynamic sheet propensity and cross-strand interactions.
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Affiliation(s)
- Li-Hung Kuo
- Department of Chemistry, National Taiwan University , Taipei 10617, Taiwan
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18
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Zastrow ML, Pecoraro VL. Designing functional metalloproteins: from structural to catalytic metal sites. Coord Chem Rev 2013; 257:2565-2588. [PMID: 23997273 PMCID: PMC3756834 DOI: 10.1016/j.ccr.2013.02.007] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Metalloenzymes efficiently catalyze some of the most important and difficult reactions in nature. For many years, coordination chemists have effectively used small molecule models to understand these systems. More recently, protein design has been shown to be an effective approach for mimicking metal coordination environments. Since the first designed proteins were reported, much success has been seen for incorporating metal sites into proteins and attaining the desired coordination environment but until recently, this has been with a lack of significant catalytic activity. Now there are examples of designed metalloproteins that, although not yet reaching the activity of native enzymes, are considerably closer. In this review, we highlight work leading up to the design of a small metalloprotein containing two metal sites, one for structural stability (HgS3) and the other a separate catalytic zinc site to mimic carbonic anhydrase activity (ZnN3O). The first section will describe previous studies that allowed for a high affinity thiolate site that binds heavy metals in a way that stabilizes three-stranded coiled coils. The second section will examine ways of preparing histidine rich environments that lead to metal based hydrolytic catalysts. We will also discuss other recent examples of the design of structural metal sites and functional metalloenzymes. Our work demonstrates that attaining the proper first coordination geometry of a metal site can lead to a significant fraction of catalytic activity, apparently independent of the type of secondary structure of the surrounding protein environment. We are now in a position to begin to meet the challenge of building a metalloenzyme systematically from the bottom-up by engineering and analyzing interactions directly around the metal site and beyond.
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Affiliation(s)
- Melissa L. Zastrow
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
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19
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Neupane LN, Lee KH. Selective and sensitive turn on detection of Hg2+ in aqueous solution using a thioether-appended dipeptide. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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20
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Oheix E, Spencer N, Gethings LA, Peacock AFA. Conformational Study of an Artificial Metal-Dependent Regulation Site for Use in Designer Proteins. Z Anorg Allg Chem 2013; 639:1370-1383. [PMID: 25995524 PMCID: PMC4431501 DOI: 10.1002/zaac.201300131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 05/21/2013] [Indexed: 11/07/2022]
Abstract
This report describes the dimerisation of glutathione, and by extension, other cysteine-containing peptides or protein fragments, with a 5, 5'-disubstituted-2, 2'-bipyridine or 6, 6"-disubstituted-2, 2':6',2"-terpyridine unit. The resulting bipy-GS2 and terpy-GS2 were investigated as potential metal ion dependent switches in aqueous solution, and were found to predominantly adopt the transoïd conformation at physiological pH. Metal complexation with CuII and ZnII at this pH has been studied by UV/Vis, CD, NMR and ion-mobility mass spectrometry. ZnII titrations are consistent with the formation of a 1:1 ZnII:terpy-GS2 complex at pH 7.4, but bipy-GS2 was shown to form both 1:1 and 1:2 complexes with the former being predominant under dilute micromolar conditions. Formation constants for the resulting 1:1 complexes were determined to be log KM 6.86 (bipy-GS2 ) and 6.22 (terpy-GS2 ), consistent with a higher affinity for the unconstrained bipyridine, compared to the strained terpyridine. CuII coordination involves the initial formation of 1:1 complexes, followed by 1.5Cu:1bipy-GS2 and 2Cu:1terpy-GS2 complexes at micromolar concentrations. Binding constants for formation of the 1:1 complexes (log KM 12.5 (bipy-GS2 ); 8.04 and 7.14 (terpy-GS2 )) indicate a higher affinity for CuII than ZnII. Finally, ion-mobility MS studies detected the free ligands in their protonated form, and were consistent with the formation of two different Cu adducts with different conformations in the gas-phase. We illustrate that the bipyridine and terpyridine dimerisation units can behave like conformational switches in response to Cu/Zn complexation, and propose that in future these can be employed in synthetic biology with larger peptide or protein fragments, to control large scale folding and related biological function.
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Affiliation(s)
- Emmanuel Oheix
- School of Chemistry, University of BirminghamEdgbaston, B15 2TT, UK
| | - Neil Spencer
- School of Chemistry, University of BirminghamEdgbaston, B15 2TT, UK
| | - Lee A Gethings
- Waters CorporationAtlas Park, Simonsway, Wythenshawe, Manchester, M22 5PP, UK
| | - Anna F A Peacock
- School of Chemistry, University of BirminghamEdgbaston, B15 2TT, UK
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21
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Affiliation(s)
- Shohei Tashiro
- Department of Chemistry, Graduate School of Science, The University of Tokyo
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo
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Day JW, Kim CH, Smider VV, Schultz PG. Identification of metal ion binding peptides containing unnatural amino acids by phage display. Bioorg Med Chem Lett 2013; 23:2598-600. [PMID: 23541674 DOI: 10.1016/j.bmcl.2013.02.106] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 02/15/2013] [Accepted: 02/25/2013] [Indexed: 12/29/2022]
Abstract
The bidentate metal binding amino acid bipyridylalanine (BpyAla) was incorporated into a disulfide linked cyclic peptide phage displayed library to identify metal ion binding peptides. Selection against Ni(2+)-nitrilotriacetic acid (NTA) enriched for sequences containing histidine and BpyAla. BpyAla predominated when selections were carried out at lower pH, consistent with the differential pKa's of histidine and BpyAla. Two peptides containing BpyAla were synthesized and found to bind Ni(2+) with low micromolar dissociation constants. Incorporation of BpyAla and other metal binding amino acids into peptide and protein libraries should enable the evolution of novel binding and catalytic activities.
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Affiliation(s)
- Jonathan W Day
- Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
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23
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Cal M, Jaremko Ł, Jaremko M, Stefanowicz P. The metallacrowns as templates for spontaneous self-assembly of polypeptides into a tetrahelical bundle. NEW J CHEM 2013. [DOI: 10.1039/c3nj00641g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Hirayama T, Taki M, Akaoka K, Yamamoto Y. Development of a dual functional luminescent sensor for zinc ion based on a peptidic architecture. Bioorg Med Chem Lett 2012; 22:7410-3. [DOI: 10.1016/j.bmcl.2012.10.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 10/04/2012] [Accepted: 10/13/2012] [Indexed: 11/30/2022]
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25
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Pires S, Habjanič J, Sezer M, Soares CM, Hemmingsen L, Iranzo O. Design of a Peptidic Turn with High Affinity for HgII. Inorg Chem 2012; 51:11339-48. [DOI: 10.1021/ic3008014] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Sara Pires
- Instituto de Tecnologia
Química e Biológica, Universidade Nova de Lisboa, Avenida da República, 2780-157
Oeiras, Portugal
| | - Jelena Habjanič
- Instituto de Tecnologia
Química e Biológica, Universidade Nova de Lisboa, Avenida da República, 2780-157
Oeiras, Portugal
| | - Murat Sezer
- Instituto de Tecnologia
Química e Biológica, Universidade Nova de Lisboa, Avenida da República, 2780-157
Oeiras, Portugal
| | - Cláudio M. Soares
- Instituto de Tecnologia
Química e Biológica, Universidade Nova de Lisboa, Avenida da República, 2780-157
Oeiras, Portugal
| | - Lars Hemmingsen
- Department of Chemistry, University of Copenhagen, Universitetsparken
5, 2100 København Ø, Denmark
| | - Olga Iranzo
- Instituto de Tecnologia
Química e Biológica, Universidade Nova de Lisboa, Avenida da República, 2780-157
Oeiras, Portugal
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26
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Shaw WJ. The Outer-Coordination Sphere: Incorporating Amino Acids and Peptides as Ligands for Homogeneous Catalysts to Mimic Enzyme Function. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2012. [DOI: 10.1080/01614940.2012.679453] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Rama G, Ardá A, Maréchal JD, Gamba I, Ishida H, Jiménez-Barbero J, Vázquez ME, Vázquez López M. Stereoselective Formation of Chiral Metallopeptides. Chemistry 2012; 18:7030-5. [DOI: 10.1002/chem.201201036] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Indexed: 12/23/2022]
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28
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Beck W. Metal Complexes of Biologically Important Ligands, CLXXVI.[1] Formation of Peptides within the Coordination Sphere of Metal Ions and of Classical and Organometallic Complexes and Some Aspects of Prebiotic Chemistry. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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29
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Lohani CR, Kim JM, Lee KH. Two dansyl fluorophores bearing amino acid for monitoring Hg2+ in aqueous solution and live cells. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.106] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Jabre ND, Korostelova N, Kodanko JJ. A highly divergent approach for synthesis of metal-binding peptide libraries. J Org Chem 2011; 76:2273-6. [PMID: 21381716 DOI: 10.1021/jo102371q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly divergent approach for the synthesis of metal-binding peptides is described. This approach builds pyridine-based chelators in a stepwise fashion on resin and provides rapid access to a diverse array of metal-binding peptides in minimal synthetic steps.
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Affiliation(s)
- Nitinkumar D Jabre
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, USA
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31
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Ming Yang C. Biometal binding-site mimicry with modular, hetero-bifunctionally modified architecture encompassing a Trp/His motif: Insights into spatiotemporal noncovalent interactions from a comparative spectroscopic study. Dalton Trans 2011; 40:3008-27. [DOI: 10.1039/c0dt00237b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Novel highly emissive non-proteinogenic amino acids: synthesis of 1,3,4-thiadiazolyl asparagines and evaluation as fluorimetric chemosensors for biologically relevant transition metal cations. Amino Acids 2010; 40:1065-75. [DOI: 10.1007/s00726-010-0730-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 08/21/2010] [Indexed: 10/19/2022]
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33
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Esteves CI, Raposo MMM, Costa SP. Synthesis and evaluation of benzothiazolyl and benzimidazolyl asparagines as amino acid based selective fluorimetric chemosensors for Cu2+. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Jabre ND, Respondek T, Ulku SA, Korostelova N, Kodanko JJ. A Divergent Strategy for Attaching Polypyridyl Ligands to Peptides. J Org Chem 2010; 75:650-9. [DOI: 10.1021/jo9021953] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nitinkumar D. Jabre
- Department of Chemistry, Wayne State Universty, 5101 Cass Ave, Detroit, Michigan 48202
| | - Tomasz Respondek
- Department of Chemistry, Wayne State Universty, 5101 Cass Ave, Detroit, Michigan 48202
| | - Selma A. Ulku
- Department of Chemistry, Wayne State Universty, 5101 Cass Ave, Detroit, Michigan 48202
| | - Nadiya Korostelova
- Department of Chemistry, Wayne State Universty, 5101 Cass Ave, Detroit, Michigan 48202
| | - Jeremy J. Kodanko
- Department of Chemistry, Wayne State Universty, 5101 Cass Ave, Detroit, Michigan 48202
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35
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Unnatural benz-X-azolyl asparagine derivatives as novel fluorescent amino acids: synthesis and photophysical characterization. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.08.086] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Nadler A, Hain C, Diederichsen U. Histidine Analog Amino Acids Providing Metal-Binding Sites Derived from Bioinorganic Model Systems. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900472] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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37
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Cisnetti F, Gateau C, Lebrun C, Delangle P. Lanthanide(III) Complexes with Two Hexapeptides Incorporating Unnatural Chelating Amino Acids: Secondary Structure and Stability. Chemistry 2009; 15:7456-69. [DOI: 10.1002/chem.200900747] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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38
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Pires MM, Chmielewski J. Self-assembly of Collagen Peptides into Microflorettes via Metal Coordination. J Am Chem Soc 2009; 131:2706-12. [PMID: 19182901 DOI: 10.1021/ja8088845] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marcos M. Pires
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084
| | - Jean Chmielewski
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084
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39
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40
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Costa SP, Batista RM, Raposo MMM. Synthesis and photophysical characterization of new fluorescent bis-amino acids bearing a heterocyclic bridge containing benzoxazole and thiophene. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.096] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Przybyla DE, Chmielewski J. Metal-triggered radial self-assembly of collagen peptide fibers. J Am Chem Soc 2008; 130:12610-1. [PMID: 18763780 DOI: 10.1021/ja804942w] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A metal-triggered self-assembling collagen peptide was designed and synthesized to generate fibers through a radial growth mechanism. The assembly of the fibers was made possible through the placement of a bipyridine ligands within the center of the triple helix and was triggered by the addition of Fe(II).
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Affiliation(s)
- David E Przybyla
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, USA
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42
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Joshi BP, Lee KH. Synthesis of highly selective fluorescent peptide probes for metal ions: tuning selective metal monitoring with secondary structure. Bioorg Med Chem 2008; 16:8501-9. [PMID: 18723358 DOI: 10.1016/j.bmc.2008.08.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Revised: 08/05/2008] [Accepted: 08/06/2008] [Indexed: 11/25/2022]
Abstract
Metal selective fluorescent peptide probes (dansyl-Cys-X-Gly-His-X-Gly-Glu-NH2, X = Pro or Gly) were developed by synthesizing peptides containing His, Cys, and Glu residues with Pro-Gly sequence to stabilize a turn structure and Gly-Gly sequence to adopt a random coil. The probe containing two Gly-Gly sequences exhibited marked selectivity only for Cu2+ over 13 metal ions including competitive transition and Group I and II metal ions under physiological buffer condition. In contrast, the probe containing double Pro-Gly sequences showed high selectivity for Zn2+. The peptide probe containing one Pro-Gly sequence exhibited selectivity for Zn2+ and Cu2+. CD spectra indicated that the secondary structure of the probes played an important role in the selective metal monitoring and a pre-organized secondary structure is not required for the selective detection of Cu2+ ion, but is required for the detection of Zn2+. We investigated and characterized the binding affinity, binding stoichiometry, reversibility, and pH sensitivity of the peptide probes.
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Affiliation(s)
- Bishnu Prasad Joshi
- Bio-organic Chemistry Laboratory, Department of Chemistry, Inha University, 253 Younghyun-Dong, Nam-Gu, Inchon-City 402-751, Republic of Korea
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43
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Xie J, Liu W, Schultz PG. A genetically encoded bidentate, metal-binding amino acid. Angew Chem Int Ed Engl 2008; 46:9239-42. [PMID: 17893898 DOI: 10.1002/anie.200703397] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jianming Xie
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Rd, La Jolla, CA 92037, USA
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44
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Xie J, Liu W, Schultz P. A Genetically Encoded Bidentate, Metal-Binding Amino Acid. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703397] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Joshi BP, Cho WM, Kim J, Yoon J, Lee KH. Design, synthesis, and evaluation of peptidyl fluorescent probe for Zn2+ in aqueous solution. Bioorg Med Chem Lett 2007; 17:6425-9. [PMID: 17949975 DOI: 10.1016/j.bmcl.2007.10.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 10/02/2007] [Accepted: 10/03/2007] [Indexed: 10/22/2022]
Abstract
A new fluorescent peptide probe for the detection of Zn(2+) was synthesized on the basis of zinc binding ligands in zinc enzymes. The peptide that has a unique amino acid sequence displayed a great selectivity for Zn(2+) in the presence of several transition metal ions in aqueous solution. The reversibility, binding stoichiometry, binding affinity, and pH sensitivity of the sensor were studied. Further, on-bead application of the peptide as chemosensors was demonstrated.
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Affiliation(s)
- Bishnu Prasad Joshi
- Department of Chemistry, Bioorganic Chemistry Laboratory, Inha University, Incheon 402-751, Republic of Korea
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46
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Yang CM, Li X, Wei W, Li Y, Duan Z, Zheng J, Huang T. Dissecting the General Physicochemical Properties of Noncovalent Interactions Involving Tyrosine Side Chain as a Second-Shell Ligand in Biomolecular Metal-Binding Site Mimetics: An Experimental Study Combining Fluorescence,13C NMR Spectroscopy and ESI Mass Spectrometry. Chemistry 2007; 13:3120-30. [PMID: 17201001 DOI: 10.1002/chem.200600661] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Detailed physicochemical features inherent in the dynamic cation-pi interactions of aromatic amino acid side chains in the secondary coordination spheres around metal ions were extracted and mapped by intrinsic tyrosine fluorescence titration experiments with two homologous, artificially engineered metal-binding scaffolds which mimic metal-binding sites in metalloproteins. A newly formulated method for the treatment of fluorescence titration data allows straightforward assessment of both the magnitudes and properties of metal-chelation-assisted cation-aromatic interactions (K2) underlying a proposed two-step metallosupramolecular association process. The unprecedented linear platform-motif correlations between the two contrasting scaffolds in their changes in tyrosine fluorescence on binding of 3d metal cations help to elucidate the properties of general cation-arene recognition corresponding to the metal-responsive characteristics of the second-shell Tyr residue surrounding the metal-binding sites in the supramolecular context, and thereby define a new noncovalent design principle for metal-ion recognition in aqueous solution. As supported by NMR spectroscopic and ESI-MS analyses and molecular mechanics force field calculations, the systematic study exemplifies the concept of using steady-state tyrosine fluorescence as a powerful tool for comprehensive descriptions of cation-pi interactions in the extended environment of a metal-binding site. We established that the physicochemical properties pertaining to indirect metal-arene interactions are highly dependent on the electronic properties of the metal ions. This work suggests that second-shell cation-pi interactions may play more diverse roles, including modulation of structure, reactivity, and function of metal-binding sites, than the previously well-established direct cation-pi interactions involving hard cations (e.g., alkali metal ions). Moreover, such a study will continue to complement theoretical predications and/or the early experimental investigations in organic solvents.
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Affiliation(s)
- Chi Ming Yang
- Neurochemistry and Physical Organic Chemistry, Nankai University, Tianjin 300071, China.
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47
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Ye Y, Liu M, Kao JLF, Marshall GR. Novel trihydroxamate-containing peptides: design, synthesis, and metal coordination. Biopolymers 2006; 84:472-89. [PMID: 16705688 DOI: 10.1002/bip.20532] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Novel trihydroxamate-containing peptides were designed to mimic desferrioxamine (Desferal(R), DFO, a naturally occurring siderophore) but possess distinct conformational restrictions and varied lipophilicity to probe structure vs. metal coordination. The synthesis was performed via fragment condensation of hydroxamate-containing oligopeptides such as Fmoc-Leu- Psi[CON(OBz)]-Phe-Ala-Pro-OH and H-Leu-Psi[CON(OBz)]-Phe-Ala-Pro-OBu(t) (Fmoc: 9-fluor enylmethoxycarbonyl; OBz: benzyl; OBu(t): tert-butyl) either in solution or on a solid support. The metal-binding properties were studied by electrospray ionization-mass spectroscopy (ESI-MS), ultraviolet (UV)-visible spectroscopy, and (1)H nuclear magnetic resonance (NMR). Similar to the dihydroxamate analogs previously explored [Biopolymers (Peptide Science), 2003, Vol. 71, pp. 489-515], the compounds with three hydroxamates arrayed at 10-atom intervals, i.e., H-[Leu-Psi[CON(OH)]-Phe-Ala-Pro](3)-OH (P1), cyclo[Leu-Psi[CON(OH)]-Phe-Ala-Pro](3) (P2), and H-[Leu-Psi(CONOH)-Phe-Ala-Pro](2)-Leu-NHOH (P7), exhibited high affinities for intramolecular coordination with Fe(III) and Ga(III). As expected, both P1 and P2 showed higher relative Fe(III)-binding affinities than the corresponding dihydroxamate-containing peptide analogs (P11 and P12). Even though both P1 and P2 did not compete with DFO in the relative metal-binding affinity in both solution and gas phases, P1, P2, and DFO exhibited similar relative binding selectivities to 11 different metal ions including Fe(III), Fe(II), Al(III), Ga(III), In(III), Zn(II), Cu(II), Co(II), Ni(II), Gd(III), and Mn(II). Compared to the other metal ions, they had higher relative binding affinities with Fe(III), Fe(II), Al(III), Ga(III), and In(III). The decreased metal-binding affinities of P1 and P2 in comparison with DFO suggested the conformational restrictions of their backbones perturb their three hydroxamate groups from optimal hexadentate orientations for metal coordination. As detected by ESI-MS, P2 was distinguished from both P1 and DFO by solvation of its Ga(III) and Fe(III) complexes (such as acetonitrile or water), thereby stabilizing the resulting complexes in the gas phase. Noteworthy, P2 led to 69% death rate in Hela cells at a concentration of 50 microM, exhibiting higher cytotoxicity than DFO in vitro despite its much lower affinity for iron. This enhanced toxicity may simply reflect the increased lipophilicity of the cyclic trihydroxamate (P2) together with the improvements in its cell penetration, and/or subsequent intracellular molecular recognition of both side chains and hydroxamate groups. The cytotoxicity was significantly suppressed by precoordination with Ga(III) or Fe(III), suggesting a mechanism of toxicity via sequestration of essential metal ions as well as the importance of curbing the metal coordination before targeting. The potential of such siderophore-mimicking peptides in oncology needs further exploration.
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Affiliation(s)
- Yunpeng Ye
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, 660 S. Euclid Avenue, St. Louis, MO 63110, USA
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48
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Ishida H, Maruyama Y, Kyakuno M, Kodera Y, Maeda T, Oishi S. Artificial Metalloproteins with a Ruthenium Tris(bipyridyl) Complex as the Core. Chembiochem 2006; 7:1567-70. [PMID: 16915598 DOI: 10.1002/cbic.200600162] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hitoshi Ishida
- Department of Chemistry, School of Science, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan.
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49
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Lelais G, Seebach D, Jaun B, Mathad R, Flögel O, Rossi F, Campo M, Wortmann A. β-Peptidic Secondary Structures Fortified and Enforced by Zn2+ Complexation – On the Way toβ-Peptidic Zinc Fingers? Helv Chim Acta 2006. [DOI: 10.1002/hlca.339] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Lelais G, Seebach D, Jaun B, Mathad R, Flögel O, Rossi F, Campo M, Wortmann A. β-Peptidic Secondary Structures Fortified and Enforced by Zn2+ Complexation – On the Way toβ-Peptidic Zinc Fingers? Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690040] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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